CN104315742B - Electric automobile air conditioner heat pump with economizer and control method thereof - Google Patents
Electric automobile air conditioner heat pump with economizer and control method thereof Download PDFInfo
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- CN104315742B CN104315742B CN201410619658.0A CN201410619658A CN104315742B CN 104315742 B CN104315742 B CN 104315742B CN 201410619658 A CN201410619658 A CN 201410619658A CN 104315742 B CN104315742 B CN 104315742B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of electric automobile air conditioner heat pump with economizer and the method for operation thereof, it is characterized in that: be respectively provided with the first four-way change-over valve and the second four-way change-over valve in systems and switch valve group as refrigerant flow path；It is respectively arranged with major loop and subsidiary loop in the port of export side of device for drying and filtering；Major loop is that the port of export of self-desiccation filter acts that what be sequentially connected with is economizer, reservoir and main electric expansion valve；Subsidiary loop is that the port of export of self-desiccation filter acts that what be sequentially connected with is the 3rd electromagnetic valve, QI invigorating electric expansion valve, economizer, stop valve, to the gas supplementing opening of compressor.The present invention can be effectively improved heating load and the refrigerating capacity of system, increases recycling economy.
Description
Technical field
The present invention relates to a kind of electric automobile air-conditioning system, particularly relate to electric automobile air conditioner heat pump and the control method thereof of a kind of subsidiary economizer.
Background technology
Society is increasing to the demand of the energy, and global energy crisis increasingly sharpens.So, the electric automobile of energy-conserving and environment-protective has become the developing direction of future automobile industrialization.And the basic demand of Hyundai Motor consumer has also been become as the heat pump performance of one of car comfort index.
For now, electric automobile heat supply mainly uses ptc material heating technique, but its energy consumption is higher, and the flying power of automobile is produced large effect, and therefore, this technology is not maximally effective solution.Air conditioner with air-source heat pump group has that system is simple, energy-conserving and environment-protective, the advantage such as easy to maintenance, therefore obtain large-area popularization and application.If but conventional air source heat pump air-conditioner unit is applied in cold wet area Winter heat supply, when ambient temperature is very low, the heat fade of system can quickly, and heating capacity is not enough.Additionally, the too low compression ratio that can increase system of evaporating pressure, causing that delivery temperature raises, additionally, the easy frosting under worst cold case of car outdoor heat exchanger, these all can affect safety and the reliability of air conditioner heat pump system.
Through the retrieval of prior art is found, current electric automobile air conditioner heat pump generally adopts a four-way change-over valve, and the half-duplex channel of some check valve combination compositions realizes the changeable operation of cold-producing medium between different operating mode.But this working medium flow passage selector device needs to use multiple auxiliary equipment, its pipe-line system structure complexity can be made to be greatly increased, cause that system cost is high, reliability is low.
Such as Chinese patent literature CN103090579A, publication date describes a kind of heat pump type air conditioning system used for electric vehicle on May 8th, 2013.The check valve group that this system is mainly made up of indoor air cooling heat exchanger, outdoor air cooling heat exchanger, four check valves, a compressor with gas supplementing opening, restricting element and some auxiliary equipment are constituted.And it is provided with QI invigorating loop in systems, it is intended to realize " quasi-twin-stage " compression process by compressor, solve the problem that under conventional heat pump technology cold district worst cold case in the winter time, heating capacity is not enough and compressor exhaust temperature is too high.But the QI invigorating loop that this system is set up does not provide concrete measure, control the refrigerant flow of QI invigorating circulation.For currently available technology, its control system is difficult to the flow distribution of refrigerant meeting main loop with subsidiary loop.And, this technology does not consider cold wet in winter area, when outdoor temperature is too low, and security of system that the frosting problem that outdoor heat exchanger very easily occurs is brought and integrity problem.It addition, the check valve group of four check valves compositions of this system employing and a cross valve, it is used for switching refrigerant flow path under different operating mode so that this pipe-line system structure complexity, practical operation is difficult.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, it is provided that a kind of simple in construction, the electric automobile air conditioner heat pump that with low cost, efficient energy-saving is with economizer and control method thereof.To improve heating load and the refrigerating capacity of system, increase recycling economy.
The present invention solves that technical problem adopts the following technical scheme that
The feature of the electric automobile air conditioner heat pump with economizer of the present invention is:
It is respectively provided with the first four-way change-over valve and the second four-way change-over valve in the system and switches valve group as refrigerant flow path；Compressor adopts the totally enclosed type vehicle electric air-conditioner compressor being provided with gas supplementing opening；
Being arranged in parallel indoor heat exchanger and defrosting heat exchanger, one end of its parallel line is connected with the first port of described first four-way change-over valve, and the other end of parallel line is connected with the first port of described second four-way change-over valve；Other three ports of described first four-way change-over valve connect the first port of the outlet of oil eliminator, the import of gas-liquid separator and outdoor heat exchanger respectively, the entrance of described oil eliminator is connected with the air vent of compressor, and the outlet of described gas-liquid separator is connected with the air entry of compressor；Other three ports of described second four-way change-over valve are connected with the second port of outdoor heat exchanger, device for drying and filtering and main electric expansion valve respectively；
It is respectively arranged with major loop and subsidiary loop in the port of export side of described device for drying and filtering；
Described major loop is: it is the major loop interface of economizer, reservoir and main electric expansion valve that the port of export of self-desiccation filter acts what be sequentially connected with；
Described subsidiary loop: it is the 3rd electromagnetic valve, QI invigorating electric expansion valve, the subsidiary loop interface of economizer, stop valve that the port of export of self-desiccation filter acts what be sequentially connected with, to the gas supplementing opening of compressor.
The construction features of the electric automobile air conditioner heat pump with economizer of the present invention lies also in: be independently arranged QI invigorating loop flow controlling unit, the aperture of described QI invigorating electric expansion valve is controlled with the output signal of described QI invigorating loop flow controlling unit, the signal input part that four temperature sensors are described QI invigorating loop flow controlling unit is had at least to provide temperature detection signal, described four temperature sensors are separately mounted to the entrance pipe of indoor heat exchanger and the subsidiary loop entrance pipe of export pipeline, economizer, and in the radiating fin of outdoor heat exchanger；
Described QI invigorating loop flow controlling unit calculates the evaporating pressure Pe of system, condensing pressure Pk and second vapor injection pressure P m by the detection signal of four temperature sensors, regulate the aperture of QI invigorating electric expansion valve, make second vapor injection pressure P m equal with best second vapor injection pressure P m, opt.
The construction features of the electric automobile air conditioner heat pump with economizer of the present invention lies also in: described defrosting heat exchanger is placed in outside the air-supply passage of air conditioning for automobiles.
The construction features of the electric automobile air conditioner heat pump with economizer of the present invention lies also in: be provided with the first electromagnetic valve between the first port and the indoor heat exchanger of described second four-way change-over valve, described first electromagnetic valve is opening under heat pump with cooling condition, is closed mode under defrosting operating condition；Being provided with the second electromagnetic valve between first port and defrosting heat exchanger of described second four-way change-over valve, described second electromagnetic valve is only opening under defrosting operating condition, is closed mode under rest working conditions.
The feature of the method for operation of the electric automobile air conditioner heat pump with economizer of the present invention is the method for operation arranged under cooling system operating mode:
Arranging the QI invigorating under refrigeration mode and open inversion temperature T2, as outdoor temperature≤T2, system switches to normal refrigeration mode；As outdoor temperature > T2, system switches to Gas-supplying enthalpy-increasing refrigeration mode；
Described normal refrigeration mode is: the first electromagnetic valve is opened, the second electromagnetic valve and the 3rd closed electromagnetic valve, and stop valve is opened；First port of the outlet of oil eliminator with outdoor heat exchanger is connected by the first four-way change-over valve, and the import of gas-liquid separator is connected by the first port of the first four-way change-over valve with indoor heat exchanger；Second port of outdoor heat exchanger is connected by the second four-way change-over valve with device for drying and filtering, and main electric expansion valve and the first electromagnetic valve is connected；
Described Gas-supplying enthalpy-increasing refrigeration mode is: the first electromagnetic valve and the 3rd electromagnetic valve are opened, and the second closed electromagnetic valve, stop valve is opened；First port of the outlet of oil eliminator with outdoor heat exchanger is connected by the first four-way change-over valve, and is connected by first port by the first four-way change-over valve with indoor heat exchanger of gas-liquid separator；Second port of outdoor heat exchanger is connected by the second four-way change-over valve with device for drying and filtering, and main electric expansion valve and the first electromagnetic valve is connected；
The method of operation of the electric automobile air conditioner heat pump with economizer of the present invention, is characterized in that the method for operation arranging under system heat pump operating mode is:
Arranging the QI invigorating under heating mode and open inversion temperature T1, when outdoor temperature >=T1, system switches to common heating mode；When outdoor temperature < T1, system switches to Gas-supplying enthalpy-increasing heating mode；
Described common heating mode is: the first electromagnetic valve is opened, the second electromagnetic valve and the 3rd closed electromagnetic valve, and stop valve is opened.The outlet of oil eliminator is connected with indoor heat exchanger by the first four-way change-over valve by the first port of the first four-way change-over valve, and is connected by the first port of the import of gas-liquid separator with outdoor heat exchanger；Device for drying and filtering and the first electromagnetic valve are connected by the second four-way change-over valve, and are connected by the second port of main electric expansion valve with outdoor heat exchanger；
Described Gas-supplying enthalpy-increasing heating mode is: the first electromagnetic valve and the 3rd electromagnetic valve are opened, and the second closed electromagnetic valve, stop valve is opened.Second port of the outlet of oil eliminator with indoor heat exchanger is connected by the first four-way change-over valve, and is connected by the first port of the import of gas-liquid separator with outdoor heat exchanger；Device for drying and filtering and the first electromagnetic valve are connected by the second four-way change-over valve, and are connected by the second port of main electric expansion valve with outdoor heat exchanger；
Arranging defrosting mode is: the second electromagnetic valve is opened, the first electromagnetic valve and the 3rd closed electromagnetic valve, and stop valve is opened；First port of the outlet of oil eliminator with outdoor heat exchanger is connected by the first four-way change-over valve, and the import of gas-liquid separator is connected with indoor heat exchanger by the first port of the first four-way change-over valve；Second port of outdoor heat exchanger is connected by the second four-way change-over valve with device for drying and filtering, and main electric expansion valve and the first electromagnetic valve is connected.
Compared with the prior art, the present invention has the beneficial effect that:
1, present system is installed two four-way change-over valves as switching refrigerant flow path switching valve group, it is ensured that under the various operational mode of native system, cold-producing medium simplifies pipe-line system while correctly flowing to, and improves the reliability of system.Compressor air-discharging specific enthalpy is reduced by cold-producing medium second vapor injection process, so that compressor exhaust temperature is reduced, avoiding in ambient temperature too low (heat pump working condition) or too high (cooling condition) situation, compressor exhaust temperature is too high and the security of system brought and integrity problem；Meanwhile, Gas-supplying enthalpy-increasing process, also under relatively low evaporating temperature, adds system circularly cooling agent flux, thus improve the total heating capacity of circulation, overcomes the conventional heat pump technology defect that heat capacity is not enough under worst cold case；
2, the present invention carries out flow-control for Gas-supplying enthalpy-increasing process, adopt the air compensation flow rate adjusting method being target with second vapor injection pressure, can so that system be run all the time under best air compensation operating mode, the refrigerant flow of reasonable distribution major loop and subsidiary loop, thus improve the performance of air-conditioning.
3, defrosting heat exchanger is arranged on outside the air-supply passage of air conditioning for automobiles by the present invention, when defrosting mode is converted to heating mode, it is possible to be prevented effectively from and condense the glass for vehicle window frosting that water causes from air channel blowout.
4, the present invention is provided with QI invigorating inversion temperature T1 and T2, common heating mode and Gas-supplying enthalpy-increasing heating mode can be divided into when system heats, in like manner, normal refrigeration mode and Gas-supplying enthalpy-increasing refrigeration mode it is divided into during refrigeration, control Gas-supplying enthalpy-increasing process only when car indoor/outdoor temperature-difference causes heating capacity or refrigerating capacity deficiency relatively greatly, and during excessive discharge temperature, open use；Common refrigeration or common heating mode is adopted, it is to avoid use the power consumption that Gas-supplying enthalpy-increasing causes to increase under small load condition or efficiency reduces when indoor/outdoor temperature-difference is less.
Accompanying drawing explanation
Fig. 1 is present system structural representation.
Fig. 2 is normal refrigeration mode principle schematic of the present invention.
Fig. 3 is Gas-supplying enthalpy-increasing refrigeration mode principle schematic of the present invention.
Fig. 4 is the common heating mode principle schematic of the present invention.
Fig. 5 is Gas-supplying enthalpy-increasing heating mode principle schematic of the present invention.
Fig. 6 is defrosting mode principle schematic of the present invention.
Fig. 7 is the pressure-enthalpy chart of system Gas-supplying enthalpy-increasing theoretical circulation.
Number in the figure: 1 compressor, 2 oil eliminators, 3 first four-way change-over valves, 4 indoor heat exchangers, 5 defrosting heat exchanger, 6 gas-liquid separators, 7 second four-way change-over valves, 8 devices for drying and filtering, 9 first electromagnetic valves, 10 second electromagnetic valves, 11 stop valves, 12 outdoor heat exchangers, 13 the 3rd electromagnetic valves, 14 QI invigorating electric expansion valves, 15 reservoirs, 16 main electric expansion valves, 17 economizers.Detailed description of the invention
As it is shown in figure 1, the version of electric automobile air conditioner heat pump with economizer is in the present embodiment:
It is respectively provided with the first four-way change-over valve 3 and the second four-way change-over valve 7 in the system and switches valve group as refrigerant flow path；Compressor 1 adopts the totally enclosed type vehicle electric air-conditioner compressor being provided with gas supplementing opening, it is possible to adopt vortex, piston type or rolling rotor compressor.
As it is shown in figure 1, be arranged in parallel indoor heat exchanger 4 and defrosting heat exchanger 5, one end of its parallel line is connected with the first port of described first four-way change-over valve 3, and the other end of parallel line is connected with the first port of described second four-way change-over valve 7；Other three ports of described first four-way change-over valve 3 connect the first port of the outlet of oil eliminator 2, the import of gas-liquid separator 6 and outdoor heat exchanger 12 respectively, the entrance of described oil eliminator 2 is connected with the air vent of compressor 1, and the outlet of described gas-liquid separator 6 is connected with the air entry of compressor 1；Other three ports of described second four-way change-over valve 7 are connected with the second port of outdoor heat exchanger 12, device for drying and filtering 8 and main electric expansion valve 16 respectively.
It is respectively arranged with major loop and subsidiary loop in the port of export side of described device for drying and filtering 8.
Described major loop is: it is the major loop interface of economizer 17, reservoir 15 and main electric expansion valve 16 that the port of export of self-desiccation filter 8 acts what be sequentially connected with.
Described subsidiary loop: it is the 3rd electromagnetic valve 13, QI invigorating electric expansion valve 14, the subsidiary loop interface of economizer 17, stop valve 11 that the port of export of self-desiccation filter 8 acts what be sequentially connected with, to the gas supplementing opening of compressor 1.
In the present embodiment, it is independently arranged QI invigorating loop flow controlling unit, the aperture of described QI invigorating electric expansion valve 14 is controlled with the output signal of described QI invigorating loop flow controlling unit, the signal input part that four temperature sensors are described QI invigorating loop flow controlling unit is had at least to provide temperature detection signal, described four temperature sensors are separately mounted to the entrance pipe of indoor heat exchanger 4 and the subsidiary loop entrance pipe of export pipeline, economizer 17, and in the radiating fin of outdoor heat exchanger 12.
In being embodied as, defrosting heat exchanger 5 is placed in outside the air-supply passage of air conditioning for automobiles.
Being provided with the first electromagnetic valve 9 between the first port and the indoor heat exchanger 4 of described second four-way change-over valve 7, described first electromagnetic valve 9 is opening under heat pump with cooling condition, is closed mode under defrosting operating condition；Being provided with the second electromagnetic valve 10 between first port and defrosting heat exchanger 5 of described second four-way change-over valve 7, described second electromagnetic valve 10 is only opening under defrosting operating condition, is closed mode under rest working conditions.
Being provided with economizer and the Gas-supplying enthalpy-increasing type compressor with gas supplementing opening in present system, the compression process of cold-producing medium has been divided into two sections by QI invigorating process, makes system realize quasi-two-stage compression.Under cooling condition, when outdoor environment temperature is higher than T2, system switches to Gas-supplying enthalpy-increasing operating mode, the refrigerant flow of lifting system, and increase the degree of supercooling of cold-producing medium, thus also reduce compressor exhaust temperature while improving cooling system amount, otherwise system then switches to normal refrigeration mode, it is prevented that the power consumption caused due to Gas-supplying enthalpy-increasing under small load condition increases and efficiency reduction；In like manner, under heat pump working condition, when outdoor environment temperature is lower than T1, system switches to Gas-supplying enthalpy-increasing operating mode.Enable described air conditioner heat pump system highly effective and safe under round-the-clock complicated weather to run reliably, ensure the comfort level in car simultaneously.About the setting of T1 and T2, its numerical value can change according to system concrete condition, and such as arranging T2 during cooling condition is 38 DEG C, only when ambient temperature is higher than 38 DEG C, switches to Gas-supplying enthalpy-increasing refrigeration mode, otherwise then runs with normal refrigeration mode；Arranging T1 for another example during heat pump working condition is 0 DEG C, only when ambient temperature is lower than 0 DEG C, switches to Gas-supplying enthalpy-increasing heating mode, otherwise runs with common heating mode.
The present invention is directed to the QI invigorating loop working medium flow control method of Gas-supplying enthalpy-increasing process is:
The second vapor injection amount of system is by second vapor injection pressure PmDetermining, when the second vapor injection pressure of system is equal with best second vapor injection pressure P m, opt, system can obtain best air compensation, and now the COP of system and the job stability of unit all can reach comparatively ideal state.Best second vapor injection pressure P m, opt are comprehensively determined by evaporating pressure Pe, condensing pressure Pk and correction factor k,Wherein Pk is system condensing pressure, and Pe is system evaporating pressure, and k is the correction factor measured by specific experiment.In the present embodiment, QI invigorating loop flow controlling unit calculates the evaporating pressure Pe of system, condensing pressure Pk and second vapor injection pressure P m by the detection signal of four temperature sensors, regulate the aperture of QI invigorating electric expansion valve 14, make second vapor injection pressure P m and best second vapor injection pressure P m, opt is equal, so that system obtains best air compensation.The air compensation flow rate adjusting method being target with intermediate pressure that the present invention adopts, it is possible to system is circulated in and runs under the operating mode of best air compensation, improve the performance of air-conditioning.
System operation mode one:
Fig. 2 show normal refrigeration mode schematic diagram, and when system is in cooling condition, if outdoor temperature≤T2, system switches to normal refrigeration mode as shown in Figure 2, and the first electromagnetic valve 9 is opened, and the second electromagnetic valve 10 and the 3rd electromagnetic valve 13 are closed, and stop valve 11 is opened.First port of the outlet of oil eliminator 2 with outdoor heat exchanger 12 is connected by the first four-way change-over valve 3, and the import of gas-liquid separator 6 is connected by the first port of the first four-way change-over valve 3 and indoor heat exchanger 4；Second port of outdoor heat exchanger 12 and device for drying and filtering 8 are connected by the second four-way change-over valve 7, and main electric expansion valve 16 and the first electromagnetic valve 9 are connected.
Under normal refrigeration mode, cold-producing medium is after compressor 1 compresses, becoming the refrigerant gas of High Temperature High Pressure, after oil eliminator 2, inlet chamber external heat exchanger 12 is condensed into subcooled liquid, drying filter 8, economizer 17, reservoir 15, and throttled by main electric expansion valve 16, become the gas-liquid mixture of low-temp low-pressure, enter indoor heat exchanger 4 then through the first electromagnetic valve 9, it is evaporated to gaseous working medium, enters compressor 1 through gas-liquid separator 6.
System operation mode two:
Fig. 3 show Gas-supplying enthalpy-increasing refrigeration mode schematic diagram, when system is in cooling condition, if outdoor temperature > is T2, system switches to Gas-supplying enthalpy-increasing refrigeration mode as shown in Figure 3, first electromagnetic valve 9 and the 3rd electromagnetic valve 13 are opened, and the second electromagnetic valve 10 cuts out, and stop valve 11 is opened.First port of the outlet of oil eliminator 2 with outdoor heat exchanger 12 is connected by the first four-way change-over valve 3, and being connected gas-liquid separator 6 by the first port of the first four-way change-over valve 3 and indoor heat exchanger 4；Second port of outdoor heat exchanger 12 and device for drying and filtering 8 are connected by the second four-way change-over valve 7, and main electric expansion valve 16 and the first electromagnetic valve 9 are connected.
Under Gas-supplying enthalpy-increasing refrigeration mode, cold-producing medium, after compressor 1 compresses, becomes the refrigerant gas of High Temperature High Pressure, and after oil eliminator 2, inlet chamber external heat exchanger 12 is condensed into subcooled liquid.After device for drying and filtering 8, refrigerant liquid is divided into two parts, some refrigerant liquid enters subsidiary loop, it is down to intermediate pressure after QI invigorating electric expansion valve 14 throttles, formation is calmed the anger liquid mixture, and heat exchange occurs the refrigerant liquid higher with the temperature from major loop in economizer 17.Afterwards, compressor second vapor injection mouth is returned to through stop valve 11, main circuit refrigerant liquid is through economizer 17, make cold-producing medium supercool further, throttle through reservoir 15, main electric expansion valve 16, become the gas-liquid mixture of low-temp low-pressure, enter indoor heat exchanger 4 through electromagnetic valve 9, it is evaporated to gaseous working medium, enters compressor 1 then through gas-liquid separator 6.
System operation mode three:
Fig. 4 show common heating mode schematic diagram, and when system is in heat pump working condition, if outdoor temperature >=T1, system switches to common heating mode as shown in Figure 4, and the first electromagnetic valve 9 is opened, and the second electromagnetic valve 10 and the 3rd electromagnetic valve 13 are closed, and stop valve 11 is opened.The outlet of oil eliminator 2 is connected by the first four-way change-over valve 3 by the first port of the first four-way change-over valve 3 and indoor heat exchanger 4, and is connected by the first port of the import of gas-liquid separator 6 with outdoor heat exchanger 12；Device for drying and filtering 8 and the first electromagnetic valve 9 are connected by the second four-way change-over valve 7, and are connected by the second port of main electric expansion valve 16 with outdoor heat exchanger 12.
Under common heating mode, cold-producing medium, after compressor 1 compresses, becomes the refrigerant gas of High Temperature High Pressure, after oil eliminator 2, enters indoor heat exchanger 4 and is condensed into subcooled liquid.Then through the first electromagnetic valve 9, device for drying and filtering 8, economizer 17, reservoir 15 is also throttled by main electric expansion valve 16, becomes the gas-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger 12, is evaporated to gaseous working medium, enters compressor 1 then through gas-liquid separator 6.
System operation mode four:
The schematic diagram of Gas-supplying enthalpy-increasing heating mode shown in Fig. 5, when system is in heat pump working condition, if outdoor temperature < is T1, system switches to Gas-supplying enthalpy-increasing heating mode as shown in Figure 5, first electromagnetic valve 9 and the 3rd electromagnetic valve 13 are opened, and the second electromagnetic valve 10 cuts out, and stop valve 11 is opened.Second port of the outlet of oil eliminator 2 with indoor heat exchanger 4 is connected by the first four-way change-over valve 3, and is connected by the first port of the import of gas-liquid separator 6 with outdoor heat exchanger 12；Device for drying and filtering 8 and the first electromagnetic valve 9 are connected by the second four-way change-over valve 7, and are connected by the second port of main electric expansion valve 16 with outdoor heat exchanger 12.
Under Gas-supplying enthalpy-increasing heating mode, cold-producing medium, after compressor 1 compresses, becomes high-temperature high-pressure refrigerant gas, after oil eliminator 2, enters indoor heat exchanger 4 and is condensed into subcooled liquid.After the first electromagnetic valve 9, device for drying and filtering 8, refrigerant liquid is divided into two parts, some refrigerant liquid enters subsidiary loop, after QI invigorating electric expansion valve 14 throttles, it is down to intermediate pressure, calm the anger in becoming liquid mixture, and heat exchange occurs the refrigerant liquid higher with the temperature from major loop in economizer 17.Afterwards, compressor second vapor injection mouth is returned to through stop valve 11.Main circuit refrigerant liquid, through economizer 17, makes cold-producing medium supercool further, throttles through reservoir 15, main electric expansion valve 16, become the gas-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger 12, is evaporated to gaseous working medium, enters compressor 1 then through gas-liquid separator 6.
System operation mode five:
Fig. 6 show defrosting mode schematic diagram, and under defrosting mode, the second electromagnetic valve 10 is opened, and the first electromagnetic valve 9 and the 3rd electromagnetic valve 13 are closed, and stop valve 11 is opened.First port of the outlet of oil eliminator 2 with outdoor heat exchanger 12 is connected by the first four-way change-over valve 3, and the import of gas-liquid separator 6 is connected by the first port of the first four-way change-over valve 3 and indoor heat exchanger 4；Second port of outdoor heat exchanger 12 and device for drying and filtering 8 are connected by the second four-way change-over valve 7, and main electric expansion valve 16 and the first electromagnetic valve 9 are connected.
Under defrosting mode, cold-producing medium, after compressor 1 compresses, becomes the refrigerant gas of High Temperature High Pressure, and after oil eliminator 2, inlet chamber external heat exchanger 12 is condensed into subcooled liquid.Then through device for drying and filtering 8, economizer 17, reservoir 15 is also throttled by main electric expansion valve 16, after becoming the gas-liquid mixture of low-temp low-pressure, enters defrosting heat exchanger through the second electromagnetic valve 10, it is evaporated to gaseous working medium, enters compressor 1 then through gas-liquid separator 6.After waiting to defrost, system switches to heat pump working condition again, continues heat supply.
The Gas-supplying enthalpy-increasing theoretical circulation of present system is as shown in Figure 7, the present invention is applied to electric automobile air conditioner heat pump, after employing Gas-supplying enthalpy-increasing technology, realize " accurate two grades " compression, compared with conventional heat pump technology, the delivery temperature of compressor is down to t3 ' by from t3, it is ensured that the operation that compressor can be safe and reliable.And the cold-producing medium in major loop is before throttling, obtain supercool in economizer further, thus the system that further increases is in the circulation heat under worst cold case.And QI invigorating process can increase the capacity of compressor, thus further increasing heating capacity and the refrigerating capacity of circulation, improve the economy of system circulation.
Claims (4)
1. the electric automobile air conditioner heat pump with economizer, is characterized in that:
It is respectively provided with the first four-way change-over valve (3) and the second four-way change-over valve (7) in the system and switches valve group as refrigerant flow path；Compressor (1) adopts the totally enclosed type vehicle electric air-conditioner compressor being provided with gas supplementing opening；
It is arranged in parallel indoor heat exchanger (4) and defrosting heat exchanger (5), one end of its parallel line is connected with the first port of described first four-way change-over valve (3), and the other end of parallel line is connected with the first port of described second four-way change-over valve (7)；Other three ports of described first four-way change-over valve (3) connect the first port of the outlet of oil eliminator (2), the import of gas-liquid separator (6) and outdoor heat exchanger (12) respectively, the entrance of described oil eliminator (2) is connected with the air vent of compressor (1), and the outlet of described gas-liquid separator (6) is connected with the air entry of compressor (1)；Other three ports of described second four-way change-over valve (7) are connected with the second port of outdoor heat exchanger (12), device for drying and filtering (8) and main electric expansion valve (16) respectively；
It is respectively arranged with major loop and subsidiary loop in the port of export side of described device for drying and filtering (8)；
Described major loop is: it is the major loop interface of economizer (17), reservoir (15) and main electric expansion valve (16) that the port of export of self-desiccation filter (8) acts what be sequentially connected with；
Described subsidiary loop: it is the 3rd electromagnetic valve (13), QI invigorating electric expansion valve (14), the subsidiary loop interface of economizer (17), stop valve (11) that the port of export of self-desiccation filter (8) acts what be sequentially connected with, to the gas supplementing opening of compressor (1).
2. the electric automobile air conditioner heat pump with economizer according to claim 1, it is characterized in that: be independently arranged QI invigorating loop flow controlling unit, the aperture of described QI invigorating electric expansion valve (14) is controlled with the output signal of described QI invigorating loop flow controlling unit, the signal input part that four temperature sensors are described QI invigorating loop flow controlling unit is had at least to provide temperature detection signal, described four temperature sensors are separately mounted to entrance pipe and the export pipeline of indoor heat exchanger (4), the subsidiary loop entrance pipe of economizer (17), and in the radiating fin of outdoor heat exchanger (12)；
Described QI invigorating loop flow controlling unit calculates the evaporating pressure Pe of system, condensing pressure Pk and second vapor injection pressure P m by the detection signal of four temperature sensors, regulate the aperture of QI invigorating electric expansion valve (14), make second vapor injection pressure P m equal with best second vapor injection pressure P m, opt.
3. the electric automobile air conditioner heat pump with economizer according to claim 1, is characterized in that: described defrosting heat exchanger (5) is placed in outside the air-supply passage of air conditioning for automobiles.
4. the electric automobile air conditioner heat pump with economizer according to claim 1, it is characterized in that: between first port and indoor heat exchanger (4) of described second four-way change-over valve (7), be provided with the first electromagnetic valve (9), described first electromagnetic valve (9) is opening under heat pump with cooling condition, is closed mode under defrosting operating condition；It is provided with the second electromagnetic valve (10) between first port and defrosting heat exchanger (5) of described second four-way change-over valve (7), described second electromagnetic valve (10) is only opening under defrosting operating condition, is closed mode under rest working conditions.
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| CN201410619658.0A CN104315742B (en) | 2014-11-05 | 2014-11-05 | Electric automobile air conditioner heat pump with economizer and control method thereof |
| CN201610563257.7A CN106016811B (en) | 2014-11-05 | 2014-11-05 | Electric automobile air conditioner heat pump system with economizer |
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| CN201410619658.0A CN104315742B (en) | 2014-11-05 | 2014-11-05 | Electric automobile air conditioner heat pump with economizer and control method thereof |
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| CN201610563257.7A Division CN106016811B (en) | 2014-11-05 | 2014-11-05 | Electric automobile air conditioner heat pump system with economizer |
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Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613665A (en) * | 2015-02-02 | 2015-05-13 | 珠海格力电器股份有限公司 | Heat pump air conditioning system |
| CN106152588A (en) * | 2015-04-21 | 2016-11-23 | 珠海格力电器股份有限公司 | Low-temperature enthalpy spraying unit |
| CN105042971A (en) * | 2015-09-15 | 2015-11-11 | 珠海格力电器股份有限公司 | Heat pump unit and control method and device thereof |
| CN105157270A (en) * | 2015-09-24 | 2015-12-16 | 无锡同方人工环境有限公司 | Low-environment-temperature air source heat pump system with undercooling loop |
| CN105258387A (en) * | 2015-10-19 | 2016-01-20 | 广东美的暖通设备有限公司 | Variable refrigerant flow system and intermediate pressure control method thereof |
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| CN105201837B (en) * | 2015-10-26 | 2017-11-17 | 珠海格力节能环保制冷技术研究中心有限公司 | The adjusting method and control system of a kind of double-stage compressor and in-between increasing enthalpy pressure |
| CN105509363B (en) * | 2016-01-31 | 2017-10-31 | 嘉兴学院 | High-efficiency cleaning multiple-energy-source comprehensively utilizes cold-hot combined supply system |
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| CN106828027B (en) * | 2017-01-23 | 2023-04-18 | 郑州科林车用空调有限公司 | Vehicle heat pump air conditioner adopting pressure sensor |
| CN106766002B (en) * | 2017-02-04 | 2019-10-01 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioning, device and air-conditioning |
| CN106671733A (en) * | 2017-02-15 | 2017-05-17 | 唐齐新 | Air-conditioning system used in electric vehicle |
| US10183549B2 (en) * | 2017-04-27 | 2019-01-22 | Ford Global Technologies, Llc | Modulating vehicle heating and cooling system and control method |
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| CN107192159A (en) * | 2017-07-11 | 2017-09-22 | 南京天加环境科技有限公司 | A kind of cold and hot unit of improved Gas-supplying enthalpy-increasing |
| CN107677009A (en) * | 2017-11-20 | 2018-02-09 | 广东美的制冷设备有限公司 | Air-conditioner system, progress control method and computer-readable recording medium |
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| CN109455058B (en) * | 2018-11-09 | 2020-07-24 | 安徽江淮汽车集团股份有限公司 | Economical air conditioning system of electric automobile and control method |
| CN111231771B (en) * | 2018-11-29 | 2021-08-10 | 比亚迪股份有限公司 | Vehicle thermal management system, control method thereof and vehicle |
| CN109974359A (en) * | 2019-04-22 | 2019-07-05 | 天津赛诺梅肯能源科技有限公司 | A kind of air source heat pump suitable for cold district is very fast to remove defrosting system |
| CN111121336A (en) * | 2019-12-19 | 2020-05-08 | 青岛索迷尔能源科技有限公司 | Double-power single-pass driving heat pump with double-clutch gearbox switching |
| CN111059663A (en) * | 2019-12-28 | 2020-04-24 | 维克（天津）有限公司 | Ultra-low temperature air cooling module machine part heat recovery unit and control mode |
| CN113059980B (en) * | 2021-03-31 | 2022-01-07 | 比亚迪股份有限公司 | Integrated thermal management system and vehicle |
| CN113899104B (en) * | 2021-11-22 | 2023-03-31 | 上海本家空调系统有限公司 | Inhale engine drive air source heat pump set that tonifying qi switched |
| CN115468329B (en) * | 2022-09-13 | 2023-10-13 | 约克广州空调冷冻设备有限公司 | heat pump system |
| CN115717741A (en) * | 2022-11-16 | 2023-02-28 | 势加透博洁净动力如皋有限公司 | Multi-split central air conditioning system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4850197A (en) * | 1988-10-21 | 1989-07-25 | Thermo King Corporation | Method and apparatus for operating a refrigeration system |
| US20080098760A1 (en) * | 2006-10-30 | 2008-05-01 | Electro Industries, Inc. | Heat pump system and controls |
| CN201476406U (en) * | 2009-09-04 | 2010-05-19 | 大连中星科技开发有限公司 | Low-temperature quasi-two-stage air source heat pump unit |
| CN201621896U (en) * | 2010-01-15 | 2010-11-03 | 王章君 | Hot water heating system of scroll compressor having centre supplement gas |
| CN103090579B (en) * | 2011-10-31 | 2015-10-28 | 中国科学院理化技术研究所 | Air conditioner heat pump system of electric automobile |
| CN102538273B (en) * | 2012-02-10 | 2013-11-06 | 海信（山东）空调有限公司 | Vapor-injected air-conditioning system, vapor-injected air-conditioning control method and air-conditioner |
| CN102809248B (en) * | 2012-08-15 | 2014-09-03 | 特灵空调系统(中国)有限公司 | Air-cooled cold water heat pump air-conditioner hot water system |
| CN103807917B (en) * | 2012-11-08 | 2016-10-05 | 珠海格力电器股份有限公司 | Air conditioner and air supply control method applied to same |
| KR20140090792A (en) * | 2013-01-10 | 2014-07-18 | 박정해 | Alternation heat exchanger type hot gas defrosting heat-pump |
| CN103175344B (en) * | 2013-03-13 | 2015-04-29 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN203231582U (en) * | 2013-04-11 | 2013-10-09 | 东华大学 | Two-stage compression heat pump system with economizer and defrosting by means of hot gas bypassing |
| CN203349569U (en) * | 2013-04-25 | 2013-12-18 | 广东美的制冷设备有限公司 | Air conditioner |
-
2014
- 2014-11-05 CN CN201610563257.7A patent/CN106016811B/en active Active
- 2014-11-05 CN CN201410619658.0A patent/CN104315742B/en active Active
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